Little or no audio from some Directv channels with new soundbar - DirecTV

Guest Post

Have a new soundbar which is being fed via the digital/optical port of my TV. TV is being fed by Genie receiver via HDMI.
I get no audio from a few of channels, including the Sonic Music channels. Previously I used an AV receiver for sound which was fed via the only other sound output, the TV headphones jack and did not experience this problem.
What could be happening here?

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